This bundle includes everything that might reasonably be sung by an alto ('soprano 2' or indeed 'soprano 3' in the language of Italian opera scores): Studenti and Fanciulle in act 1, and so on. In general, it is the lower of two parts, but when the parts are split in three there are 'alto 2' which is the lowest everywhere and 'alto 1' which is the lower of two but middle of three.